场与非线性介质原子相互作用模型的量子纠缠动力学特性  

Dynamical entanglement in the model of field interacted with atoms of a nonlinear medium

作　　者：吕海艳[1] 袁伟[1] 侯喜文[1] 

机构地区：[1]华中师范大学物理科学与技术学院,武汉430079

出　　处：《物理学报》2013年第11期42-45,共4页Acta Physica Sinica

基　　金：国家自然科学基金资助(批准号:11174099)资助的课题~~

摘　　要：在场和非线性介质原子相互作用模型下,利用concurrence和约化Neumann熵两种纠缠量度,研究推广的二项式场态和原子基态的量子纠缠动力学.结果表明concurrence与约化Neumann熵是正关联占优势;在合适的条件下,纠缠在较长时间内几乎是不变的.这有利于量子信息过程.The dynamical entanglement in a model of the field interacted with atoms in a nonlinear medium is studied in terms of concurrence and the reduced Neumann entropy for the generalized binomial state of the field and the ground state of atoms. It is shown that concurrence is dominantly-positively correlated with the reduced Neumann entropy. The entanglement under suitable condition is nearly unchanged for a long time. This is useful for quantum information processing.

关 键 词：推广的二项式态 CONCURRENCE 约化Neumann熵 

分 类 号：O431.2[机械工程—光学工程]